Document 1359
Richardson, W.J. 1972. Temporal variations in the ability of individual radars in detecting birds. National Research Council Associate Committee on Bird Hazards to Aircraft Fieldnote 61. 70 pages.
Richardson, W.J. 1972. Temporal variations in the ability of individual radars in detecting birds. National Research Council Associate Committee on Bird Hazards to Aircraft Fieldnote 61. 70 pages.
